import 'dart:math';

import 'package:flutter/material.dart';

class BuildingList extends StatefulWidget {
  const BuildingList({super.key, required this.point});

  final String point;

  @override
  State<BuildingList> createState() => _RoomListState();
}

class _RoomListState extends State<BuildingList> {
  @override
  void initState() {
    super.initState();
    // 获取列表
    fakeData();
  }

  Map data = {
    "point": "", // 记录小区信息
    "size": 0, // 随机产生楼栋的数量
    "type": "", // 小区的楼栋名称(size>4 单元, size<=4 号楼)
  };
  fakeData() {
    // 1.1 随机产生楼栋的数量
    Random random = Random();
    int size = random.nextInt(6) + 2; // 3-8
    // 1.2 确定小区楼栋的名称
    String type = size > 5 ? '单元' : '号楼';
    // 1.3 更新数据
    setState(() {
      data = {
        "point": widget.point,
        "size": size,
        "type": type,
      };
      print(data);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('选择楼栋'),
      ),
      body: ListView.builder(
        itemBuilder: (BuildContext context, int index) {
          // 小区信息
          final point = data['point'];
          final building = '${index + 1}${data['type']}';
          return Container(
              color: Colors.white,
              padding: const EdgeInsets.all(10),
              child: GestureDetector(
                onTap: () {
                  Navigator.pushNamed(
                    context,
                    // 分步表单第二步: 跳转到房间选择页
                    '/room_list',
                    // 传递小区信息+楼栋信息
                    arguments: {
                      'point': data['point'],
                      'building': '${index + 1}${data['type']}',
                    },
                  );
                },
                child: Row(
                  children: [
                    Expanded(child: Text('$point$building')),
                    const Row(
                      children: [
                        Icon(Icons.arrow_forward_ios,
                            size: 16, color: Colors.black),
                      ],
                    )
                  ],
                ),
              ));
        },
        itemCount: data['size'],
      ),
    );
  }
}
